In the Soviet Union, and I imagine the other Marxist–Leninist countries, people were sometimes diagnosed as mentally ill for not believing in socialism.
I get your point, but I do somewhat wonder about the sanity of people in the Soviet Union who would not, at least, pretend to believe in socialism.
>Often a major pain of their lives that fuels their anxiety and/or depression is fear that their contempt for illegitimate authorities will cause them to be financially and socially marginalized; but they fear that compliance with such illegitimate authorities will cause them existential death.
Dissidents and human right activists were sent for mental institution mostly by diagnosing schizophrenia as a means to discredit them and as message to others. We should applaud those brave souls and not doubt their sanity.